TY  - BOOK
AU  - Berg,Walter G.
AU  - Berg,W.G,com
TI  - American Railway Bridges and Buildings: official reports 
U1  - 135 
PY  - 1898///
CY  - Chicago
PB  - [s.n.]
KW  - Transportation engineering
KW  - Railroads
KW  - Railroad engineering
ER  -